1.

The current of a stream runs at 1 km/hr. A motor boat goes 35 km upstream and back again to the starting point in 12 hours. The speed of motor boat in still water is ?

A. 6 km/hr
B. 7 km/hr
C. 8.5 km.hr
D. 8 km/hr
Answer» B. 7 km/hr


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